diff --git a/.travis.yml b/.travis.yml
index 169d024..92bc412 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,6 @@ php:
     - 5.6
     - 7.0
     - 7.1
-    - hhvm
 
 env:
     global:
@@ -24,10 +23,13 @@ branches:
 matrix:
     allow_failures:
         - php: hhvm
+          dist: trusty
     fast_finish: true
     include:
         - php: 5.5
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
+        - php: hhvm
+          dist: trusty
 
 before_install:
     - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi
diff --git a/composer.json b/composer.json
index d9bc91b..93a4dbb 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
         "cakephp/cakephp": "^3.1"
     },
     "require-dev": {
-        "php-http/client-integration-tests": "^0.5.1"
+        "php-http/client-integration-tests": "^0.6"
     },
     "autoload": {
         "psr-4": {